How to implement a simple parser that does well-formedness checking on XML, such

ID: 3917595 • Letter: H

Question

How to implement a simple parser that does well-formedness checking on XML, such as the following:

<BackgroundCheck>

<CriminalHistory>

<HistoryCode>x</HistoryCode>

<HistoryCode>y</HistoryCode>

<HistoryCode>z</HistoryCode>

</CriminalHistory>

</BackgroundCheck>

Please note that using a a parser like Xerces is not acceptable. You can either describe the algorithm, write pseudo code or optionally implement the solution.

Explanation / Answer

Here is pseudo code for create simple parse parsar in xml. <html>
<body> <p id="history"></p> <script>
var text, parser, xmlDoc;

text ="<HistoryCode>x</tHistoryCode>" +
"<HistoryCode>y<HistoryCode>" +
"<HistoryCode>z</HistoryCode>" +
"</book></bookstore>";

parser = new DOMParser();
xmlDoc = parser.parseFromString(text,"text/xml");

document.getElementById("history").innerHTML =
xmlDoc.getElementsByTagName("Historycode")[0].childNodes[0].nodeValue;
</script>

</body>
</html>

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How to implement a simple parser that does well-formedness checking on XML, such

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